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so i was messing with my n3dsxl's micro sd card and deleted the emunand partition on the micro sd and created a new partition (4 gb btw) and reformatted it with the n3dsxl system and used the cubic ninja exploit like usual and when i try to go into gw mode it just leaves me with a blank screen what do i do

Sounds like you deleted your emunand and then for some reason tried to create a partition that is larger than the size of a NAND? Why did you do that?
Did you even inject an emunand back in (I still don't think it would work)? You should probably complete reformat your SD (back up the contents) and not try to mess around with the partitions, and just let gw format a new emunand for you (if you have a backup of your emunand you can inject it back once your partitions are fixed)

I deleted the emuNANd partition to fit a bootstrap for ninjhax to generate xorpads for an omega ruby rom i was planning to edit, turns out after i reformatted emunand it works again so all i have to do is buy a larger microsd to fit the rom and bootstrap

Can you do a Gateway Diagnostic? If you get FPGA OK you shoulg be able to get into GW mode after emunand format...
Edit: Black screen usually is Bad Launcher.bat

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no it seems he had just not removed the emunand partition properly so gateway was still trying to boot up emunand from the SD but he had overwrote most of it without re-setting up the partitions(so gateway was still assuming emunand was there), formatting emunand again made it work again so the issue was just that he was trying to enter gateway mode with a corrupt/broken emunand setup

It works now, but I can try using Panasonic SD formatter, afterwords i will do a diagnostic check, what i did was i went into Control Panel->Administrative Tools->Computer Management->Disk Management then i went into the micro SD card with the 2.0 GB of unallocated space on it and used cmd to delete the whole partition and create a new volume with all 4.0 of GB restored and it didn't work, after a while i reformatted it onto the micro SD and GW mode worked again

no it seems he had just not removed the emunand partition properly so gateway was still trying to boot up emunand from the SD but he had overwrote most of it without re-setting up the partitions(so gateway was still assuming emunand was there), formatting emunand again made it work again so the issue was just that he was trying to enter gateway mode with a corrupt/broken emunand setup

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THIS! I also read somewhere that you need to use some partition manager to completely and properly format the SD card because otherwise, even if a small trace of it is left, Gateway will think/detect the emunand partition is there and try to boot it and black screen.

THIS! I also read somewhere that you need to use some partition manager to completely and properly format the SD card because otherwise, even if a small trace of it is left, Gateway will think/detect the emunand partition is there and try to boot it and black screen.